<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { userLoginService, userRegisterService } from '@/api/user.js'
import { useUserStore } from '@/stores/user'
import { useRouter } from 'vue-router'
const isRegister = ref(true)

// 注册
const ruleForm = ref({
    username: '',
    password: '',
    repassword: ''
})
const rules = { // 不必是响应式的，直接配对象即可
    username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
        { min: 5, max: 10, message: '用户名长度为5-10', trigger: 'blur' },
    ],
    // 正则表达式：
    password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        { pattern: /^\S{6,15}$/, message: '密码为6-15位的非空字符', trigger: 'blur' }
    ],
    // 自定义匹配校验：
    //  (1) rule 当前校验规则相关的信息
    //  (2) value所校验的表单元素目前的表单值
    //  (3) callback 无论成功还是失败，都都要 callback 回调
    //      - callback() 校验成功
    //      - callback(new Error(错误信息)) 校验失败
    repassword: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        {
            validator: (rule, value, callback) => {
                // 判断 value 与 当前 form 中收集的 password 是否一致
                if (value !== ruleForm.value.password) {
                    callback(new Error("两次输入结果不一致"))
                } else {
                    callback()  // 就算校验成功，也要callback()
                }
            }
        }
    ],
}
// 我们这里创建一个与我们form绑定的变量
const form = ref()
const register = async () => {
    console.log("开始注册")
    await form.value.validate() // 对我们每一个 form-item 进行校验，完成注册前的预校验
    await userRegisterService(ruleForm.value)
    ElMessage.success('注册成功！')
    isRegister.value = false // 到登录
}

const userStore = useUserStore()
const router = useRouter()
const login = async () => {
    await form.value.validate()
    const res = await userLoginService(ruleForm.value)
    userStore.setToken(res.data.token)  // 请求返回结果中有token
    ElMessage.success("登陆成功")
    router.push('/')
}
</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="ruleForm" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="ruleForm.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码"
                        v-model="ruleForm.password"></el-input>
                </el-form-item>
                <el-form-item prop="repassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码"
                        v-model="ruleForm.repassword"></el-input>
                </el-form-item>
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <el-form ref="form" size="large" autocomplete="off" :rules="rules" :model="ruleForm" v-else>
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="ruleForm.username"></el-input>
                </el-form-item>
                <el-form-item prop="passowrd">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"
                        v-model="ruleForm.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false">忘记密码？</el-link>
                    </div>
                </el-form-item>
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_bg.jpg') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>